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Last seen: Jun 13, 2026
Hi @harleecooper, you'll get some help here. But it may be well worth getting in an expert in renewable heating to look at the system set up and commi...
Refrigerant efficiency is quoted in absolute terms with reference to the refrigerant properties. There are many more variables that determine the over...
Welcome @biagg from a fellow Grant 10kW Aerona owner. The key with the Aerona is to have all radiators and thermostats constantly calling for heat a...
Great news @crimson on the primary flow. Get well soon in what hopefully is a warmer house. I need to research that LLH to see what internals could im...
All pipework on CH and DHW side in plant room that can get warm, flow and return, even expansion vessel connections, should be insulated. heat lost an...
Thanks @crimson, buried primary piping looks a proper product, probably Isoflow or similar. Good. Primary flow must be fixed #1 priority. Clean stra...
@crimson good morning. Lots of people here want this one fixed for you! What's the approximate length of buried pipework on the primary circuit under ...
Hi @crimson, sure. The formula is the sensible heat equation, to work out how much heat energy in kJ/s is being added. 9 is your flow rate as indica...
@crimson great stuff. The delta T between flow and return is high, especially when your ASHP is on low load, 1300W power consumption, that's about 1/3...
@Crimson, I hesitate to state it, but it seems like your plumbers are clueless. You need a fresh pair of eyes on the job as there's something seriousl...
Finally Grant is waking up and smelling the coffee and, when they offer their 'smart controller' option pack (which monitors primary flow rate), they ...
Hi @crimson, probably time to bite the bullet and get the system checked over by Grant. The installation manual from Grant has suggested circuits for ...
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Latest Posts
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RE: Heat pump installation quotations
@batpred Excellent, thank you very much!
By sttpd1917 , 9 minutes ago
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Hopefully this will answer your question. To...
By ASHP-BOBBA , 10 minutes ago
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RE: Help me keep the faith with my air source heat pump installation
I would be interested to find out if others do this and...
By ASHP-BOBBA , 19 minutes ago
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Harvest Thermal - ASHP with a smart thermal battery
I thought people here might find this interesting, even...
By springswood , 1 hour ago
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Don't you dare. You just carry on as you are; as @batpr...
By Majordennisbloodnok , 2 hours ago
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RE: Heat pump design review please: 5 kW Vaillant aroTHERM Plus heat pump
@ragtime27 some rooms in our house only have one place ...
By Judith , 2 hours ago
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@mkz, that's very helpful. Even if Urban Plumber are no...
By Majordennisbloodnok , 5 hours ago
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RE: Several AC coupled batteries
That is a good point, a manufacturers can stop trading,...
By Batpred , 6 hours ago
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My first question is why bother with the auto balancin...
By JamesPa , 6 hours ago
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RE: Indevolt Batteries UK Support & Info Thread
Hi @hanno - good question. The range of hybrid invert...
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RE: GivEnergy inverter tripping due to over-voltage?
@transparent the inverter was installed in 2021 and afa...
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RE: Say hello and introduce yourself
I hope so, @toodles. It's not often that we see a situa...
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RE: Electricity price predictions
Good point, I do expect the bonus of putting my energy ...
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RE: Daikin ESPAltherma and Home Assistant installation
@bash, something we haven't touched on already relates ...
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